Brake dressing compound and process of making same



Patented Aug. 16, 1927.

UNITED STATES GEORGE W. NASH, 01' DENVER, COLORADO.

BRAKE DRE SSIN G COMPOUND AND PROCESS OF MAKING SAME.

No Drawing.

This invention relates to a composition for the treatment of the linings of brakes and clutches and to the process of manufacturing the composition.

The principal object of the invention is to provide a composition of this character which will increase the wearing qualities of the'brake lining, cause the lining to exert a gentle but positive braking eifect and to eliminate squeaks, chattering, etc., in brake linings.

Another object of the invention is to provide acomposition of this character which will not be injured by water and which will prevent the lining from becoming slick and useless when operating under wet con ditions.

Still another object is to provide a composition of this character which will clean the brake lining and remove all grease, grit and dirt therefrom.

A further object is to provide a composition of this character which will immediately penetrate and saturate the brake lining regardless of its packed or hardened condition.

A still further object is to provide a composition of this character which will not evaporate and with which one application will be practically permanent.

I prefer to compound my composition of the following ingredients in substantially the following proportions:

1 gallon medium weight motor lubricating oil,

1 quart kerosene 1 ounce powdered or floated mica,

1 ounce fullers earth,

1 ounce bicarbonate of soda,

ounce pumice stone,

1 ounce glycerine,

ounce 011 of eucalyptus.

In the com osition the motor oil forms the base pro uct. The kerosene cuts or breaks down the motor oil, making an inflammable mixture. The mica acts as a dry lubricant, preventing burnin of the brake linings. The fullers earth is employed as a cleaner and roughener. It acts to microscopically roughen the brake drum and lining, providing a better gripping surface and also acts in combination with the pumice stone to break down or cut the caked grit and dirt from the band and drum, causing this grit and dirt to form in minute rolls and fall from'the lining. The bicarbonate Application filed September 4, 1926. Serial No. 133,727.

of soda acts as a dryer, that is, it will absorb water or oil which may come in contact with the lining, preventing it from forming a film on the lining, and injuring the gripping qualities thereof. The glycerine is employed as a vehicle for carrying the mica and dispersing it throughout the composition. The oi1.of eucalyptus is employed for its well known penetrating qualities and assists the entire composition in penetrating the entire depth of the brake lining.

I prefer to manufacture my composition as follows: I mix the soda withthe glycerine and in a separate container mix the kerosene with the mica, fullers earth and pumice stone, the latter mixture being stirred until all solids are in suspension in the kerosene. The motor oil is now heated to the boiling point and the soda and glycerine mixture added thereto. The oil ,is now kept boiling until the entire mixture has been reduced approximately 1/16th by volume. The kerosene with its contained mica, fullers earth, and pumice stone is now added and the mixture raised to the flash point. The vapor from the boiling oil, consisting in the main of kerosene and glycerine vapors, isnow ignited and allowed to burn. The boiling and combustion is continued until the mixture is again reduced in volume to approximately 1 gallon. In the reduction the kerosene and glycerine of the compound are burned away, leaving the residue. While the mixture is still warm, but not boiling, the oil of eucal tus is added. The main urposein the down of the composition is to vaporize and remove heavy caking greases, such as paraffin, etc-., from the mixture. It is the paraflin in lubricating .oil that makes it useless for a brake dressing in its natural condition. In the heating the entire glycerine content is iling not removed, a small amount being retained as a. binder for the mica.

It is, of course, not necessary to ignite the vapors. They could be allowed to discharge into the atmosphere. The combustion, however, of the vapors assists in heating the sur- 1 face of the compound to burn outthe paraflin. For the lubricating oil refuse crank case oil might be employed after being subject-ed to a suitable refining process.

While I have described in some detail one preferred formula for my composition and a method of carrying out my process, together with the theories which I eve explain the success of the process, it is to be understood that my invention is not limited to the precise formula nor precise procedure described nor is it dependent upon the accuracy of the theories which I have advanced. On the contrary, my invention is not to be regarded as limited except in so far as such limitations are included within the terms of the accompanying claims, in which it is my intention to claim all novelty inherent in my invention as broadly as permissible in view of the prior art.

Having thus described the invention, what I claim and desire secured by Letters Patent is 1. A composition for the treatment of brake linings comprising the following ingredients in substantially the named proportions, viz: 1 gallon lubricating oil, 1 ounce powdered mica, 1 ounce fullers earth, 1 ounce bicarbonate of soda, ounce pumice stone aIId /3 ounce oil of eucalyptus.

2. A composition for the treatment of brake linings which has been formed by the ignition of the ignitible ingredients of the following ingredients in substantially the named proportions, viz: 1 gallon lubrieating oil, 1 ounce powdered mica, 1 ounce fullers earth, 1 ounce'bicarbonate of soda, ounce pumice stone, ounce oil of eucalyptus, 1 quart kerosene, and 1 ounce glycerme.

3. The process of manufacturing a composition for the treatment of brake linings comprising heating lubricating oil to the flash point, adding a mixture of kerosene, mica, fullers earth, and pumice to the boiling oil, igniting the Vapors from the boilingv oil and continuing the combustion until the mixture has been reduced substantially *i gth by volume.

4. The process of manufacturing a composition for the treatment of brake linings comprising heating lubricating oil to the flash point, adding a mixture of kerosene, mica, fullers earth, and pumice to the boiling oil, igniting the vapors from the boiling oil and continuing the combustion until the mixture has been reduced substantially th by volume and adding oil of eucalyptus to the hot mixture.

The process of manufacturinga composition for the treatment of brake linings comprising heating lubricating oil to the flash point, adding a mixture of soda and glycerin-e to the boiling oil and continuing the boiling until the mixture has been reduced substantially th by volume, adding a mixture of kerosene, mica, fullers earth and pumice to the reduced mixture, igniting the vapors from the mixture and continuing the boiling and combustion until the mixture has again been reduced substantially th by volume.

In testimony whereof, I aflix my signat-ure.

GEORGE W. NASH. 

